Nidaros Cathedral is a Church of Norway cathedral located in the city of Trondheim in Sør-Trøndelag county, Norway. Built over the burial site of Saint Olav, the king of Norway in the 11th century, who became the patron saint of the nation. It is the traditional location for the consecration of the King of Norway. It was built from 1070 to 1300, and designated as the cathedral for the Diocese of Nidaros in 1152. After the Protestant Reformation, it was taken from the Roman Catholics by the Lutheran Church in 1537. It is the northernmost medieval cathedral in the world.